Update index.html

index.html

@@ -68,10 +68,15 @@
       </div>
     </article>
     
+    <div id="disqus_thread"></div>
+
     <!-- referral tracking, because I like knowing who's linking to my book -->
     <script src="lib/site/referrer.js" async></script>
 
     <!-- the actual article is a JS bundle -->
     <script src="article.js" async></script>
+
+    <!-- Disqus commenting -->
+    <script src="lib/site/disqus.js"></script>
   </body>
 </html>